Use tiny UTF-8-aware col -b replacement

OpenBSD col(1) doesn't understand UTF-8 and will delete all of it.
Stupid, especially when mandoc(1) tells you to use it to remove man
formatting. I shouldn't have to write something so trivial.

1 files changed, 16 insertions, 0 deletions

diff --git a/www/text.causal.agency/colb.c b/www/text.causal.agency/colb.c
new file mode 100644
index 00000000..5faabc3a
--- /dev/null
+++ b/www/text.causal.agency/colb.c
@@ -0,0 +1,16 @@
+#include <locale.h>
+#include <stdio.h>
+#include <wchar.h>
+int main(void) {
+	setlocale(LC_CTYPE, "en_US.UTF-8");
+	wint_t next, prev = WEOF;
+	while (WEOF != (next = getwchar())) {
+		if (next == L'\b') {
+			prev = WEOF;
+		} else {
+			if (prev != WEOF) putwchar(prev);
+			prev = next;
+		}
+	}
+	if (prev != WEOF) putwchar(prev);
+}